Which protocol distributes reachability routes within the SD-WAN overlay?

Which protocol distributes reachability routes within the SD-WAN overlay?

• A. Bidirectional Forwarding Detection (BFD)
• B. SLAAC
• C. LISP
• D. Overlay Management Protocol (OMP)

Answer: (D)

In an SD-WAN overlay, the control plane must share reachability information so every edge can forward traffic to any other site. The protocol that handles distributing these reachability routes across the overlay is Overlay Management Protocol. OMP runs between the SD-WAN edges and the orchestrator, advertising VPN prefixes, next-hops, and policy so the overlay can build consistent forwarding tables. Other options don’t fit this role: BFD is for rapid failure detection of a path, not distributing routes; SLAAC is for IPv6 address autoconfiguration, not overlay routing; LISP is a separate routing approach and isn’t the standard protocol used to propagate overlay reachability in Cisco SD-WAN.

In an SD-WAN overlay, the control plane must share reachability information so every edge can forward traffic to any other site. The protocol that handles distributing these reachability routes across the overlay is Overlay Management Protocol. OMP runs between the SD-WAN edges and the orchestrator, advertising VPN prefixes, next-hops, and policy so the overlay can build consistent forwarding tables.

Other options don’t fit this role: BFD is for rapid failure detection of a path, not distributing routes; SLAAC is for IPv6 address autoconfiguration, not overlay routing; LISP is a separate routing approach and isn’t the standard protocol used to propagate overlay reachability in Cisco SD-WAN.